1 - (phenylalkyl-cycloalkyloxyalkyl)-piperazinyl-4-acetic acid-anilide compounds and therapeutic compositions

ABSTRACT

BASIC ETHERS HAVING THE FORMULA   1-((4-((R1-PHENYL)-X-C&lt;(-(CH2)2-(CH2)N-CH2-)-(CH2)M-)-   PIPERAZIN-1-YL)-CH2-CO-NH-),R2,R3-BENZENE   WHEREIN R1, R2 AND R3 EACH REPRESENTS HYDROGEN, HALOGEN, LOWER ALKYL, ALKOXY OR TRIFLUOROMETHYL, X IS A VALENCY BOND OR A METHYLENE GROUP, N IS A WHOLE NUMBER OF FROM 1 TO 8 AND M IS 2 OR 3, AND THEIR PHARMACEUTICALLY ACCEPTABLE SALTS, HAVING CARDIOVASCULAR ACTIVITY.

United States Patent U.S. Cl..260268 R 8 Claims ABSTRACT OF THE DISCLOSURE Basic ethers having the formula (Cilfl wherein R R and R each represent hydrogen, halogen, lower alkyl, alkoxy or trifluoromethyl, X is a valency bond or a methylene group, n is a whole number of from 1 to 8 and m is 2 or 3, and their pharmaceutically acceptable salts, having cardiovascular activity.

This invention relates to basic ethers, to salts thereof, and to processes for preparing and using such compounds.

More particularly, this invention relates to compounds having the following formula:

Dn wherein R R and R which may be the same or different, represent hydrogen, halogen, lower alkyl, alkoxy or trifluoromethyl, X represents a valency bond or a methylene group, n is a whole number of from 1 to 8 and m is 2 or 3; and the pharmaceutically acceptable acid addition salts thereof.

In German Pat. No. 1,209,567, there are disclosed structurally similar basic ethers which can be used in psychiatric pharmacotherapy as useful medicaments. These known compounds have only a slight effect if any on the circulation.

In accordance with the invention, it has surprisingly been found that the new basic ethers (I) are characterized by an unexpected cardiovascular activity being highly elfective coronary dilating agents.

The new compounds according to the present invention can be prepared, for example by one of the following methods:

(21) Reaction of a basic ether of the formula:

wherein R X, n and m have the same meanings as set out above, with a haloacetanilide of the formula:

"ice

wherein R and R have the same meanings as given above and Hal is halogen; or

(b) reaction of a piperazine derivative of the formula:

wherein Y is a reactive ester group and R R and m have the same meanings as given above, with a compound of the formula:

wherein R X and n have the same meanings as given above; or

(c) reaction of a reactive acid derivative of the formula:

i x o- (ca -O-ca -cooa wherein R X, n and m have the same meanings as given above, with an aniline derivative of the formula:

R a -Q: 2 3

(VII) wherein R and R have the same meanings as set out above. The resulting therapeutically valuable basic ethers may, if desired, be converted into their salts with pharmacologically compatible acids.

As piperazine derivatives (IV) having a reactive ester group Y, it is particularly preferred to use the halides although, in principle, it is also possible to use reactive sulfonic acid esters, for example, tosylates, mesylates or brosylates.

The compounds (V) can be used either directly or in the form of their activated derivatives, for example, as alcoholates. The alcoholates are obtained by the reaction of the free tertiary alcohols with alkali metals or with the strongly basic compounds thereof, such as alkali metal aryls, alkali metal alkyls or alkali metal amides. Other activated derivatives are obtained by the metallization of the tertiary alcohol group by means of Grignard reagents.

Preferred reactive acid derivatives (VI) include, in particular, acid halides, esters, imidazolides and the like.

The piperazine derivatives (IV) used as starting materials can be obtained, for example, by the reaction of N-benzyl-piperazine with a haloacetanilide (III), hydrogenolysis of the benzyl radical, followed by N-alkylation with a bivalent alkylation agent of the formula:

wherein Y and m have the same meanings as given above and Y is a reactive ester group which is different from Y.

In order to direct the reaction as completely as possible in the desired direction and also in order to avoid double reaction, it has proved to be advantageous to use those alkylation agents (VIII), the ester group Y of which has a greater reactivity than that possessed by Y. Thus, for

4 tine, agar agar, calcium'phosphate; magnesium stearate, animal and vegetable fats, solid high molecular weight polymers (such as polyethylene glycols). Furthermore, compositions intended for oral administration can, if desired, also contain flavoring and sweetening agent's;

For afuller understandingof the nature and objects of the invention, reference may be had to the following ex-H ample which is given merely as further illustration of the inventionand is not to be construed in a limiting sense.-

obtained in the conventional manner, for example, by 10 I neutralization of the free bases (I) with non-toxic inor- EXAMPLE ganic or organic acids, for example, hydrochloric acid, I sulfuric acid, phosphoric acid, hydrobromic acid, acetic 1 {l g gfi i zgg g" 231 328 l -fii z i acid, lactic acid, citric acid, oxalic acid, malic acid, sali- P p y y cylic acid, malonic acid, maleic acid or succinic acid. (0.02 mol 1 {1 [1 (4 fluor0pheny1) cyclohexyl The new compounds (I) according to the present inoxy]-propyl-3}-piperazine were heated under reflux for 5 vention and the salts thereof can be administered enterally hours i 60 1 di h l f id i 150 1 nand parenterally in liquid or SOlld form in admixture with hydrofuran), following the addition thereto of 10.1 g. solid or liquid pharmaceutical carriers or diluents. As 1n- 9 (0.1 mol) triethylamine and 4.01 g. N-chloroacetyl-2- j ti n m it is preferred to use water which conmethylanilide. The reaction mixture was thereafterfiltered, tains the conventional additives, such as stabilizing agents, the filtrate evaporated under vacuum and the residue taken solubilizing agents, buffers and the like. Additives of this up in ether. There was precipitated out of this solution, kind include, for example, tartrate and citrate buffers, by the addition of an ethcral solution of maleic acid, the ethanol, complex-forming agents (such as ethylene-di- 2r maleate of l {l [1 (4-LflUOI'OPl16HYl)-CYCl0l16XYlOXY]- amine-tetraacetic acid and the non-toxic salts thereof), propyl-3}-piperazinyl-4-acetic acid-Z-methylanilide. The high molecular weight polymers (such as liquid polyethylmaleate was again dissolved in methanol and reprecipitated ene oxide) for the regulation of the viscosity. Solid carrier by the addition of ether to the resultant solution. The materials include, for example, starch, lactose, mannitol, yield amounted to 10.9 g. (77.5% of theory). methyl cellulose, talc, highly dispersed silicic acid, high In an analogous manner, there were obtained the com molecular weight fatty acids (such as stearic acid), gelapounds which have been set out in the following table:

TABLE I Yield,

ercent; Compound M.P,, C. of thegry 1- 1- 1-(4 chlorophenyl)-cyclohexyloxy]-propyl-3l-piperazinyl--acetic acid-2,6-dimethyl-anilide 236-238 (hydr0chloride). 74 1- 1- 1-(4-ohlorophenyl)-cyclohexyloxy]-propyl-3}-piperazinyl-4-acetic acid-2,4-dimethyl-anilide 197-198(hydrochloride) 81 1- 1- l-(4-chlorophcnyl)-eyel0hexyloxy]-propyl-3i-plperazinyl-4-acetic acid-2,3-dimethyl-anilide 209-210 (hydrochloride) 83 1- 1- 1-(4-chlorophenyl)-cyclohexyloxy]-propyl-3l-plperazinyl-tacetic acid-3,4-dichloroanilide. 229-230 (hydrochloride) 76 1- 1- 1-(4-fluorophenyl)-cyclohexyloxy1-propyl-3l-piperazinylracetic acid-2,6-dimethyl-anilide 242-243 (hydrochloride) 73 1- 1- 1-(4-fluorophenyl)-cyclohexyloxy1-propyl-3I-piperazinyl-4-acetic acid-2,4-dimcthyl-anilide 187-188 (hydrochloride) 68 1- 1- 1-(4-fluorophenyl)-cyclohexyloxy]-propyl-3}-piperazinyI-4-acetic acid-2,3-dirnethyl-anilide. 232-233 (hydrochloride 71 1- 1- 1-(4-flu0rophenyl)-cycl0l1exyl0xy]-pr0pyl-3l-piperazinyl-4-acetic acid-3,4-di1nethyl-anilide 266-267 (hydrochloride)... 65 1- 1- l-(a-fluorophenyl)-cyclohexyloxy]-propyl-3l-piperazinyl-4-acetic acid-3,4-dichloroanilide. 229-230 (hydrochloride) 78 1- 1- 1-(3-methyl-phenyl)-cyclohexyl0xy]-propyl-3l-piperazinyl-4-acetic acid-2,B-dimethyl-anilide. 235-236 (hydr0ehloride) 69 1- 1- I-(Z-methyl-phenyl)-eyolohexyloxy1-propyl-3i-piperazinyl-i acetic acid-2,fi-dimethyl-anilidc. 245-246 (hydr0ch1oride) 73 1- 1- 1-(2-methyl-phcnyl)-cyclohexyloxy1-propyl-3t-piperazinyl-4-aeetic acid-2,4-dimethyl-anilide 191-192 (hydrochl0ride) 80 1- 1- 1-(4-methy1-phenyl)-cyclohexyloxy]-propyl-3liperazinyl-i-acetic acid-2,6-dirnethyl-anilide 247-248 (hydrochloride). 68 1- 1- 1-(2-methoxy-phenyl)-cycl0heXyl0xy]-propyl-3 -piperazinyl-4-acetic acid-2,G-dimethyl-anilide. 246 (hydrochloride). 78 1- 1 1-(2-chlor0phenyl)-cyclohexyl0xy]-propyl-3i-piperazinyl-4-acetic acid-2,6-dimethyl-anilide 215-216 (hydrochloride)- 1- 1- 1-(4-chlorophenyl)cyclohexyloxy]-propyl-3i-piperazinyl-4-acetic acid-2-methyl-6-chloroanilide 162-163 (maleate) 59 1- 1- 1-(4-chlor0phenyl)-cyclohexyloxy]-propyl-3}-piperazinyl-4-acetic acid-2-methyl-3-chloroanilidea 63 1- 1- 1-(4-chlorophenyl)-cyclohexyl0xy]-propyl-3}-piperazinyl-4-acetic acid-2-methyl-4-chloroanilide 66 1 1- 1 (4-chlorophenyl)-cyclohexloxy]-propyl-3l-piperaziny1-4-acetic acid-4-methy1-3-chloroanilide. 53 l- 1- 1-(4-chlorophenyl)-cyclohexloxy]-propyl-3}-piperazinyl-4-acetic acid-2methyl-5-chloroanilide 64 1- 1- 1-(4-fiuor0phenyl)-cyclohexyloxy]-propyl-3}-piperazinyl-4-acetie acid-2,6-dichloroanilide. 79 1-[1- 1-(4-chlorophenyl)-cycl0hexyloxy1-propyl-3}-piperazinyl-4-acctic acid-2,6-dichloroanilide 75 1-{1- 1-(S-methyl-phenyD-cyclohexyloxyl-propyl-ii)-pipcrazinyl-4-acetic acid-2,4-dimethyl-ar1il 83 1-I1-[1-(4-rncthyl-phenyl)-cyclohexyloxy1-pr0pyl-3I-piperazinyl-4-acctic acid-2,4-dimethyl-anilide 73 1-{1-[1-(2-chlorophenyl)-cycl0heXyl0xy]-propyl-3l-piperazinyl4-aectic acid-2,4-dimethyl-anilide 53 l-t1-[1-(4-fiuorophenyl)-cyclohexyl0xy]-propyl-3l-piperazinyl-4-acetic acid-Z-methyl-anilide. 7 5 1-{1-(l-phenyl-cyclohexyloxy)-propyl]-piperazinyl-4-acetic acid-2,6-dirnethy1anilide 63 1-{1-(l-phenyl-cyclohexyloxy)-pr0pyl]-piperazinyll-acetic acid-2,4-dirnethylanilide g 1-{1- 1-(4-chlorophenyl)-cyclol1cptyloxyJ-propyl-3}-piperazinyl-4-acetic acid 2,6-dimethyl-an1hde 76 1-(1 1-(4-chlorophenyl)-cycl0heptyloxy]-propyl-3}-piperazinyl4-acetic acid-2,4-dimethyl-anilide 52 1- 1- 1-(4-ehlor0phenyl)-cyclopentyloxy1-pr0py1-3l-piperazinyl-4-acetic acid-2,4-dimethyl-anilide I 31 1- 1- 1-(4-ehlorophenyl)-cyclopentyloxy]-propyl-3l-piperazinyl-4-acetic acid-2,fi-dimethyl-anilide. 3 1- 1- l-( i-chlorophenyl)-cyclohexyloxy]-ethyl-2}-piperazinyl-4-acetic acid-2,6-dimethyl-anilide 71 1- 1- 1-(4-cl1lorophenyl)-cyclohexyloxy]-ethyl-2l-piperaziny1-4-acetic acid 2,4-dimethyl anilide 170 (ma1eate) 69 J 1- 1- 1-(4-chloropheny1)cyclododecyloxy]-propyl-3}-piperazinyl-4-acetic acid-2,6-dimethyl-anilide. 169 (maleate) 65 1- 1- 1-(4-fluoropheny1)-cyc1ohexyloxy]-ethyl 2}pipetazinyl-4-aeetic acid-2,6-dimethylanilide. 168 (maleate) 76 1- 1- 1-(4-flu0rophenyl)-cyclohexyloxy]-ethyl 2}-piperazinyl-4-acetic acid-2,4-dimethyl-anilide 173 (maleate) 68 1- 1- l-(4-chlorobenzyl)-cyclohexyloxy]-propyl-3}-piperazinyl-4-acetic acid-2,6-dimethyl-anilide, 236-238 (hydrochlor dc)--- 68 1- 1- 1-(4-chlorcbenzyl)-cyclohcxyloxyl-propyl-Bl-piperazinyl-4-acetic acid-2,4-dimethyl-ardlide. 202-203 (hydrochloride) Y 70 1- 1- l-(4-fluorobenzy1)-cyclohexyloxy]-propyl-3l-piperazinyl-4-acetic acid-2,6-dimethyl-anilide. 151-152 (maleata) 63 1- 1- 1-(4-fiuorobenzyl)-cyclohexyloxy]-propyl3l-piperazinyl-4-acetic acid-2,4-dimethyl-anilide. 132-133 (maleate) 61 1- 1' 1-(3-fluorobenzyl)-cycl0l1exy1oXy]-propyl-3I-piperazinyl4-acetic acid-2,6-dimethyl-anilide- 137-138 (maleate) 67 1- 1- l-(4-fiuorophenyl)-cyclohexyloxy]-propy1-3}-piperazinyl4-acetic acid-2-methyl-6-chloroanilide 165-166 (maleate) 1- 1- 1-(2-chlorophenyl)-cyclohexyloxyl-propyl-3l-piperazinyl-4-acetic acid-2,6-dichlor0anllide 156 (maleate) 72 1- 1- 1-(4-flu0rophenyl)-oyelohexyl0Xy]-propyl-3i-piperazinyl-4-acetic acid-Z-methyl-4-chloroanilide 152 (maleate) 75 1- 1- 1-(4-fluorcphenyl)-eyclohexy1oxy]-propyl-3}-piperazinyl-4-acctic acid-2-methy1-5-chloroanili 10. do 83 1- 1- 1-(4 fiuorophenyl)-cyelohexyloxy]-propyl-3l-piperazinyl-4-acetic acid-3-chl0ro 4-mcthy1-ani1ide 162 (maleate) 76 1- 1- 1-(4-fiuorophenyl)-cyclohexyloxy]-propyl-3I-piperazinyl-4-acetic acid-2-methyl-3-chloroanilide 193-194 (hydrochloride)...- 81 1-{1- 1-(4-fluorophenyl)-cyclohexyloxy]-propyl-31-piperazinyl-4-acetic acid-2,3-dichloroanilide 150 (maleate) 68 1-{1- 1-(4-fiuorophenyl)-cyclohexyloxy]-propyl-3l-piperazinylt-acetic acid-3-trifluoromethyl-anilide 136-138 (maleate) 63 1-(1- 1-(4-fiuorophenyl)-cycl0hexyloxy]-propyl-3}-piperazinyl-4-acctic acid-2-trifluoromethyl-anilide 133 (maleate) 71 1-1 1- 1-(3-trifiuoromethyl-pheny])-cyclohexyloxy]-propyl-3i-pipetaziuyl-t-acetic acid-2,fi-dimethyl-anilide 159-160 (maleate) 68 1- 1- l-(4-fiuorophenyl)-eycl0hexyloxy]-propyl-3i-piperazinyl-4-acetic acid-Z-methoxy-fi-chloroanilido 140 (maleate) 65 1- 1- 1-(4-fluorophcnyl)-cyclohexyIoxy]-ethyl-2l-piperazinyl-4-acetic acid-2-methyl-G-chloroanilide 153 (maleate 76 1- 1- 1-(4-flu0robenzyl)-cyclohexyloxy]-propyl-3I-piperazinyl-4-acetic acid-2,6-dichloroanilide 152 (maleate) 62 1- 1- 4-fluorobenzy1)-cyc1ohexyloxy]-propyl-3}-piperazinyl-4-acetic acid-2-chloro-6-methyl-aml1d 154 (maleate) 67 1- 1- 1-(4-fiuorophenyl)-cyclohexyloxyg-propyl-3l-pipcrazinyl-4-acctic acid-3-chloro-4-methoxy-ani 153 (maleate) 73 1- 1- 1-(4-fiuorophenyl)-cyclohcxyl0xy -ethyl-2)-piperazinyl-4-acetic acid-2,6-dichloroanilide 156 (maleatc) 78 1- 1- 1-(3trifluoromethyl-phenyl)-cyc1ohexyloxy]'propyl-3] piperazinyl-kacetic acid-2,6-dichl0roan1hde 157 (maleate) 75 The starting materials corresponding to structural Formula II which were used are set out in the following table:

TABLE 2 e 1-{ 1-[1-(4ch1orophenyl) -cyclopentyloxy]-propyl-3] -piperazine 280-283/0. 3 1-( 1-[1-(4-ch1orophenyl) -cyelohexyloxy]-ethy1-2 -piperazine 176-178/0. 1 1-( l-[l-(t-chlorophenyl) -cyclododeeyloxy]-propyl-3 -piperazine. 230-235/0. 2 1-{ l-[1-(4-fluorophenyl) -cyclohexy1oxy]-ethyl-2) -piperazine 170-175/0. 2 1-{ l-ll-(-chlorobenzyl)-cyclohexyxy]-propyl-3 -piperazine 240-250/0. 6 1-{ 1-[1- t-fluorobenzyl) -eyclohexyloxy]-propy1-3} -piperazine 180-183/0. 1 1-( 1-[1-(3-fluorobenzy I) -cyclohexyloxy] propyl-3}-piperazine 178-183/0. 1

In order to establish the effectiveness of the compounds in accordance with the invention as therapeutic agents exerting an effect on the cardiac and circulatory systems, the applicants carried out a series of tests, the details and significance of which are set out hereinafter.

In order to compare the eflectiveness of the novel basic ethers on the coronary blood circulation, the applicants have selected [1 (p-chlorophenyl)-cyclohexyl]-[ (4- methylpiperazinyl 1 propylJ-ether which has been described in US. Pat. 3,254,083 as the comparison compound.

An increased blood circulation in the coronary system, provided that there are no significant changes in the myocardial oxygen consumption, results in a reciprocal decrease of the coronary arteriovenous oxygen difference. This decrease in extraction of oxygen from the blood leads to an additional supply of oxygen and namely, to an improvement in the oxygen supply to the myocardium which is the ultimate aim sought to be achieved with all coronary dilating agents.

For the purpose of obtaining an exact basis for evaluating the results of the procedures involved, the decrease in coronary arteriovenous oxygen diiference (at the time of the maximum effect) has been reported in volume percent in the table as compared to the starting value. The greater the value reported the more significant was the coronary oxygen supply increase.

The procedures were carried out using 30 alert unanesthetized dogs, each weighing between 14 and 22 kg. The procedure of Rayford, Huvos and Gregg, Proc. Soc. exp. Biol. Med. 113, 876 [1963] was followed, catheters having been implanted surgically into the Sinus coronarius, the aorta and the vena cava of the animals. It was thus made possible to photometrically determine the coronary arteriovenous saturation difference (Brinkman, Arch. Chir. Neerl. 1, 177 [1949]) and from the actual hemoglobin values obtained to convert the values into the corresponding volume percents. The compounds were administered intravenously in the amounts indicated in 1 ml. of a 5% Lutrol-9-so1ution (liquid polyethylene oxide, molecular weight about 400, Basf-Ludwigshafen) in 5.5, percent aqueous glucose.

6 The following compounds were employed in the experimental procedures:

(A) 1- (p-chlorophenyl -cyclohexyl] ['y- (4-methylpiperazinyl- 1 -propyl] -ether U.S. Patent 3,254,08 3

(B) 1-{1-[1-(4-chlorophenyl)-cyclohexyloxy]-propyl-3}- piperazinyl-4-acetic acid-2,6-dimethyl-anilide (C) 1-{1-[ 1- (4-chlorophenyl) -cyclohexyloxy] -propyl- 3}-piperazinyl-4-acetic acid-2,4-dimethyl-anilide (D) 1-{ l- 1- 4-chlorophenyl -cyclohexyloxy] -propyl-3 piperazinyl-4-acetic acid-3,4-dichloro-anilide (E) 1-{ l-[ 1- (4-fluorophenyl) -cyclohexyloxy] -propy1-3-}- piperazinyl-4-acetic acid-2,6-dimethyl-anilide (F) 1-{1-[ 1- (4-fluorophenyl) -cyclohexyloxy] -propyl-3}- piperazinyl-4-acetic acid-3,4-dichloro-anilide (G) 1-{1-[ 1-(4-fluorophenyl)-cyclohexyloxy]-propyl-3}- piperazinyl-4-acetic acid-2,4dimethyl-anilide (H) 1-{1-[ 1- 4-fluorophenyl) -cyclohexyloxy] -propyl-3}- piperazinyl-4-acetic acid-3,4dimethyl-anilide (I) 1-{1-[ 1-(4-chlorobenzyl) -cyclohexyloxy]-propyl-3}- piperazinyl-4-acetic acid-2,6-dimethyl-anilide (J 1-{1- 1- (4-chlorobenzyl -cyclohexyloxy] -propyl-3}- piperaZinyl-4-acetic acid-2,4-dimethyl-anilide (K) 1-{1-[ 1-( Z-methylphenyl -cyclohexyloxy] -propyl-3}- piperazinyl-4acetic acid-2,6-dimethyl-anilide (L) 1-{1-[ 1- (4-methylphenyl) -cyclohexyloxy] -propyl- 3}-piperazinyl-4-acetic acid-2,6-dimethyl-anilide (M) 1-{ 1- 1- Z-methoxyphenyl) -cyclohexyloxy] -propyl- 3}-piperazinyl-4acetic acid-2,6-dimethyl-anilide (N) 1- 1- l-phenyl-cyclohexyloxy)-propy1]-piperazinyl- 4-acetic acid-2,4-dimethyl-anilide (O) 1-{1-[1-(4-chlorophenyl)-cycloheptyloxy]-propyl- 3}-piperazinyl-4-acetic acid-2,6-dimethyl-anilide (P) 1-{1-[ l- (4-chlorophenyl -cycloheptyloxy] -propyl- -3}-piperazinyl-4acetic acid-2,4-dimethyl-anilide (Q) 1-{ 1-[ l- (4-chlorophenyl-cyclop entyloxy] -propyl- 3}-piperazinyl-4-acetic acid-2,4-dimethyl-anilide (R) 1-{1- l- (4-chlorophenyl) -cyclopentyloxy] -propyl- 3}-piperazinyl-4-acetic acid-2,6-dimethyl-anilide (S) 1-{ l-[ 1- 4-chlorophenyl) -cyclohexyloxy] -propyl- 3}-piperazinyl-4-acetic acid-2-methyl-6-chloro-anilide (T) 1-{1-[1-(4-chlorophenyl)-cyclohexyloxy]-propy1- 3}-piperazinyl-4-acetic acid-2-methyl-3-chloro-anilide (U) 1-{1-[1-(4-chlorophenyl)-cyclohexyloxy]-propyl-3}- pipera'Z'inyl-4-acetic acid-4-methyl-3-chloro-ani1ide (V) 1-{1-[ 1- (4-chlorophenyl -cyclohexyloxy] -propyl-3}- piperazinyl-4-acetic acid-Z-methyl-S-chloro-anilide (W) 1-{ 1- 1- (4-fiuorophenyl -cyclohexyloxy] -propyl-3 piperazinyl-4-acetic acid-2,6-dichlo1'o-anilide (X) 1-{1 1- (4-chlorophenyl -cyclohexyloxy] -propyl-3}- piperazinyl-4 -acetic acid-2,6-dichloro-anilide (Y) 1-{1-[ 1-(4-chlorophenyl -cyclohexyloxy]-ethyl-2}- piperazinyl-4-acetic acid-2,4-dimethyl-anilide (Z) 1-{1-[ 1- (4-fiuorophenyl -cyclohexyloxy] -propyl-3}- piperazinyl-4-acetic acid-2-methyl-anilide (AA) 1-{ 1-[ l- (4-fluorophenyl -cyclohexyloxy] -propyl- 3}-piperazinyl-4-acetic acid-Z-methyl-6-chloro-anilide (BB 1-{ 1- 1- 2-chlorophenyl -cyclohexyloxy] -propyl- 3}-piperazinyl-4-acetic acid-2,6-dichloro-anilide (CC) l-{1-[ 1-( 4-fluorophenyl -cyclohexyloxy] -propyl- 3}-piperazinyl-4-acetic acid-2-methyl-4-chloro-anilide (DD) 1-{1-[ 1- (4-fluorophenyl) -cyclohexyloxy] -propyl- 3}-piperazinyl-4-acetic acid-Z-methyl-5-chloro-anilide EE) 1-{ l- 1- 4-fluorophenyl) -cyclohexyloxy] -p ropyl- 3}-piperazinyl-4-acetic acid-3-chloro-4-methyl-anilide (FF) 1-{1-[1-(4-fluorophenyl)-cyclohexyloxy]-propyl- 3}-piperazinyl-4-acetic acid-2,3-dichloro-anilide The above products in each case were applicated in the form of their salts.

TABLE 3.IMPROVEHENT OF THE CORONARY O SUPPLY MEASURED FROM THE a.v. DOg DIFFERENCE Dosage of Dosage, the coronary I a/k 25 1 0 3 Substance 1.v. vol. percent 1 1 Compared to the controls at maximum effect.

From the above table, it can be seen that the compounds in accordance with the invention constitute highly valuable therapeutic agents having marked coronary dilating properties in contrast to the known compound which is substantially ineffective in a dosage range of rug/kg. in the dog as a coronary dilating agent.

As the comparison compound at the dosage indicated already produced a central stimulating effect, the said effect being totally absent from the compounds of the invention, the comparison compound could not be used at this dosage or at any increased value for the instant purpose. This effect as noted is not associated with the compounds of the invention so that they are eminently suitable as medicaments for producing a coronary dilation.

In dosage unit form, the compounds as set out herein are used in amounts of from 0.1-50 mg, preferably 0.5- 10 mg, active ingredient per dosage unit. Preferably, the compositions are compounded so that for parenteral administration, 0.5-5 mg. of active compound/dosage unit is present and for oral administration 2-10 mg. of compound/dosage unit.

I What is claimed is:

1. A basic ether compound selected from the group consisting of a basic ether corresponding to the formula and a pharmaceutically acceptable acid addition salt of said basic ether, wherein R R R each represent a member selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy and trifluoromethyl, X is a valency bond or a methylene group, n is a whole number of from 1 to 4, and m is 2 or 3.

2. A compound according to claim 1 designated 1- {1- [1 (4-chlorophenyl) -cycl0hexyloxy] -propy1-3 }-piperazinyl-4-acetic acid-3,4-dichloro-anilide.

3. A compound according to claim 1 designated 1-{1- [1-(4 fluorophenyl)-cyclohexyloxy]-propyl 3}-piperazinyl-4-acetic acid-2,6-dirnethyl-anilide.

4. A compound according to claim 1 designated 1-{1- [1-(2 methylphenyl)-cyclohexyloxy]-p-ropyl 3}-piperazinyl-4-acetic acid-2,6-dimethyl-anilide.

5. A compound according to claim 1 designated 1-{1- [1-(4 chlorophenyl)-cyclopentyloXy]-propyl 3}-piperazinyl-4-acetic acid-2,6-dimethyl-anilide.

6. A compound according to claim 1 designated 1-{1- [1-(4-fluorophenyl)-cyclohexyloxy]-propyl 3}-piperazinyl-4-acetic acid-2,6-dichloro-anilide.

7. A compound according to claim 1 designated 1-{1- [1 (4 fiuorophenyl)-cycloheXyloxy]-pr0pyl 3}piperazinyl-4-acetic acid-2-methyl-6-chloro-anilide.

8. A compound according to claim 1 designated 1-{1- [1 (4 fluorophenyl)-cyclohexyloxy]-propyl 3}-piper azinyl-4-acetic acid-3-chloro-4-methyl-anilide.

References Cited UNITED STATES PATENTS 3,254,083 5/1966 Stach et al. 260268 R FOREIGN PATENTS 3,241M 4/1965 France 260268 1,209,567 1/ 1966" Germany 26026 8 DONALD G. DAUS, Primary Examiner US. Cl. X.R.

260-562 R, 562 B, 562 A, 578; 424-250 g UNITED STA'IES PA'lISN'l OFFICE CE RTIFICAIE- OF CORRECTION Patent No. 3,654,277 Dntcd pril 4, 1972 Invcntor(s) Werner Wifiter et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 4, line 15 "(0.02 M01 ,should read (0.02' M041)" C0lumn 5, line 13 4 "l75-l80/0.0" should read 175-180/0.0 5

Column 7, line '5 6, Table 3 "Dosage" should read Decrease Signed and Sealed this 19th day f SeptEmb er 1972. I

(SEAL) Attest:

ROBERT GOTTSCHALK Commissioner of Patents EDWARD M.FLETCHER,'JR. Attesting Officer 

